Hamamatsu Corp., Bridgewater, NJ, offers InGaAs devices for laser diode (LD) and dense wavelength division multiplexing (DWDM) monitoring. For LD applications the company offers front- and back-illuminated InGaAs PIN photodiodes, including the G8941 Series (0.3 to 1 mm dia. active areas) and G9230-01 Series (0.3 mm dia. active area). For DWDM channel monitoring, the company offers the G8909-01 Series photodiode array and G9201 to G9204 and G9494 Series image sensors. The photodiode array has a 40-channel parallel readout, low cross talk, and a 0.08 mm dia. active area. Image sensors combine an InGaAs photodiode array with each pixel connected to a charge amplifier array, which comprises CMOS transistors, a CDS circuit, offset compensation circuit, shift register, and a timing generator. (Global Web site: www.hamamatsu.com)
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